Chem 117 - Study guides, Class notes & Summaries

10 - The thickness of the troposphere is ___ km Troposphere - first layer of atmosphere 0-10 miles above the Earth's surface. Contains weather, greenhouse gases (bad ozone). Stratosphere - 2nd layer of atmosphere; extends from 10 to 30 miles up; location of ozone layer; absorbs 95% of Ultraviolet radiation; temperature increases with altitude increase. Mesosphere - 3rd layer of the atmosphere Ozone layer - a layer in the stratosphere (at approximately 20 miles) that contains a ...

Which of the following chemical symbols corresponds to bromine? a) Ba b) Bo c) Br d) Be e) B - C Which of the following is an example of a chemical change? a) deposition b) evaporation c) sublimation d) burning in air e) freezing - D

Phase - a homogeneous part of the system in contact with other parts of the system but separated from them by a well-defined boundary Intermolecular forces - forces of attraction between molecules Intramolecular forces - bonding forces that hold the atoms of a molecule together Van der Waals forces - the two weakest intermolecular attractions- dispersion interactions and dipole forces Dipole-dipole forces - forces of attraction between polar molecules Ion-dipole forces - attractiv...

All chemical waste generated during the lab should be placed in the appropriate waste container. - True Hot glass and cold glass look the same - Tue Which of the following is proper response to getting chemical in your eyes? - Use the eye wash station to rinse the eyes Which are examples of poor lab techniques? - -Pipetting by mouth -Filling a 10 mL graduated cylinder directly from a large reagent bottle -Shaking down a lab thermometer before using Tank tops are not considered proper att...

Energy can be converted from one form to another but energy cannot be created or destroyed. (E.univ = 0) - 1st Law of Thermodynamics (E.univ = 0) The entropy of the universe increases in a spontaneous process. Spontaneous process ( S.univ = S.sys + S.surr ) - 2nd Law of Thermodynamics (S.univ > 0) The entropy of a perfect crystalline substance is zero at the absolute zero of temperature, (-273 C = 0 K). This law enables the determination of the absolute antropies of substances - 3rd ...

Preferred oxidation of scandium - +3 Preferred oxidation of Titanium - +4 Preferred oxidation of vanadium - +5 Preferred oxidation of chromium - +3 and +6 Preferred oxidation of manganese - +2, +4, and +7 Preferred oxidation of Iron - +2 and +3 Preferred oxidation of cobalt - +2 and +3 Preferred oxidation of nickel - +2 Preferred oxidation of copper - +1 and +2 If vanadium has an e- config of 4s2 3d3, what will the configs of these be? V2+ And V3+ - 3d3 and 3d2 ...

Chemical Equilibrium - rates of forward reaction = rates of backward reaction Ex. Skiers at ski resort - # of people on top of mountain = # of people at bottom of mountain Physical Equilibrium - this the equilibrium that lies between two phases of the same substance This type of equilibrium yields equilibrium vapor pressure Ex. Glass dome of bowl of water- # of H20 molecules leaving water = # of water molecules returning Equilibrium constant - describes the state the molecules ...

CHEM 1212: Final Exam Questions and Answers Colligative Properties - CORRECT ANSWER-properties of solution, such as freezing point and boiling point, which depend on the concentration of solute particles dissolved in the solvent Freezing Point Depression Equation - CORRECT ANSWERMolality - CORRECT ANSWER-moles of solute per kg of solvent Molality= - CORRECT ANSWERWhat is the definition of colligative properties? (Antifreeze) - CORRECT ANSWERproperties of a solution that depend on the...

Which of the following chemical symbols corresponds to bromine? a) Ba b) Bo c) Br d) Be e) B - C Which of the following is an example of a chemical change? a) deposition b) evaporation c) sublimation d) burning in air e) freezing - D If Earth is 1.50 x 108 km from the Sun, what is the distance in Mm? a) 1.50 x 1017 Mm b) 1.50 x 105 Mm c) 1.50 x 10-1 Mm d) 1.50 x 102 Mm e) 1.50 x 108 Mn - B If 0.230 g of sodium metal reacts with 0.355 g of chlorine gas, what is the mass of sodiu...